VR Eyepiece Lens Assembly With Folded Polarized Light Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing VR imaging lenses are bulky, inconvenient to carry, and suffer from poor imaging quality due to light loss and scattering, limiting user experience.
Innovation Solution
A visual optical lens assembly comprising a sequence of lenses with specific refractive powers and configurations, including a reflective polarizing element and a quarter-wave plate, to optimize size, weight, and imaging quality, while using a partially-reflective element for light path folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a light path folding assembly is disposed in single lens assemblies arranged at intervals, then light path folding is achieved, but the total length of the lens becomes relatively long and inconvenient to carry
Solution Approach 1:
The patent merges the light path folding assembly with the lens structure by integrating the reflective polarizing element and quarter-wave plate directly into the lens assembly. This combination eliminates the need for separate light path folding assemblies arranged at intervals, thereby reducing the total length while maintaining the light path folding function. The integrated design allows the optical components to work together in a compact configuration.
2Loss of energy
If a light path folding assembly is disposed in single lens assemblies arranged at intervals, then light path folding is achieved, but significant loss of light energy occurs due to reflection and scattering on the lens surface
Solution Approach 1:
The patent converts the harmful reflection and scattering of light on the lens surface into a beneficial effect by using a reflective polarizing element. This element is designed to reflect specific polarization states of light that would otherwise be lost, redirecting them through the optical system. The quarter-wave plate further manipulates the polarization state to maximize light transmission. This approach transforms what was previously a source of energy loss into a mechanism for improving light utilization and imaging quality.
3Volume of moving object
If the total length of the optical system is reduced, then volume and weight are decreased, but distortion and aberration may increase
Solution Approach 1:
The patent employs parameter changes by optimizing the focal lengths, curvatures, and spacing of the lenses in the integrated assembly. By carefully adjusting these optical parameters, the system achieves compact dimensions while maintaining proper light path folding and minimizing distortion and aberration. The reflective polarizing element and quarter-wave plate are positioned at specific distances from the lenses to ensure optimal performance. This parametric optimization allows the system to be both compact and precise.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a compact, portable lens system with improved imaging clarity and realism, enhancing user immersion and participation in VR experiences.
Implementation Method 1
a reflective polarizing element
Implementation Method 2
a quarter-wave plate
Implementation Method 3
a first lens having a refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power
Data Source
AI summary
The disclosure provides a visual optical lens assembly and a Virtual Reality (VR) eyepiece system. The visual optical lens assembly sequentially includes, along an optical axis from an object side to an image side: a first lens having a refractive power, a reflective polarizing element, a second lens having a negative refractive power, a quarter-wave plate, a third lens having a negative refractive power, and a partially-reflective element. An image-side surface of the first lens is a convex surface; object-side surfaces and image-side surfaces of the second and third lenses respectively are concave surfaces and convex surfaces; the first lens to the third lens are sequentially glued, and the visual optical lens assembly meets a relational expression:1<TTL/(ImgH×tan (Semi-FOV))<2.3; and 0.9<∑CT/TD<1.